What causes the “heat island” effect? a. heat produced from a large number of people b. the materials used in building cities retain heat c. the large amount of reflected light from glass windows d. all of the above

The correct answer is (B)

The materials used in building cities retain heat

Heat islands is a phenomenon which states that inside urban areas significantly more heat is absorbed and retained than as compared to surrounding areas. Heat can be produced by burning fossil fuels or any other hydrocarbons. Burning fuel inside houses, vehicles and terrains is the main reason for making the temperature of cities higher as compared to barren lands.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

answer: question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation: